Research On Credibility Measurement Method Of Big Data For Smart Grid

Big Data technology is considered as a research focus in the academic circles at home and abroad.The research focuses on Big Data acquisition,preprocessing,analysis,mining and show etc,but the credibility of Big Data is less,which is urgent to study the new methods and new technologies for evaluating the credibility of Big Data.The credibility and quality of Big Data are studied in this paper.The relationship between data source is studied.By calculating the reliability of data source and researching the behavior characteristics of data source,a new concept of trusted virtual network is proposed,which is different from the traditional interconnection network,but it is based on the credibility between data sources and the weight value of the network is the credibility value between data sources.The construction algorithm of the trusted virtual network is proposed,and the hierarchical trusted network model which is based on the relationship between data sources is innovatively proposed.The credibility evaluation of data source,the credibility evaluation between data sources and the credibility evaluation of data are studied,they are interrelated and restricted each other and constitute a whole.In conclusion,the credibility evaluation model of Big Data is innovatively proposed.The credibility between data sources depends on the local credibility and the global credibility.The credibility evaluation of data source is composed of the expected value of the credibility of all historical data provided by data source and the recommendation credibility of data sources of each layer in the whole trusted network.The credibility evaluation of data refers to the probability of complementary events of this unreliable data provided by all the data sources which are direct or related providers in the historical records.The credibility between data sources is restricted by the credibility of data source,the credibility of data source is restricted by between the credibility of data and the credibility between data sources,the credibility of data is restricted by between the credibility between data sources and the credibility of data source.The credibility evaluation model of Big Data is introduced into the smart grid.A method to evaluate the credibility of Big Data of smart grid is firstly presented to meet the credibility needs of the smart grid data,which verifies the validity of the credibility evaluation model and provides credibility data support for the power system information control and decision-making.The credibility evaluation plan of Big Data with self-dependence intellectual property provides the technical support for our country to reach the international advanced l evel in the research of Big Data technology and credibility in the future.